The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 20, 1976
Filed:
Jan. 02, 1975
Applicant:
Inventor:
Robert Mayer, Ardmore, PA (US);
Assignee:
Sun Oil Company of Pennsylvania, Philadelphia, PA (US);
Primary Examiner:
Int. Cl.
CPC ...
H03D / ;
U.S. Cl.
CPC ...
328133 ; 307232 ; 3072 / ; 318696 ; 318184 ;
Abstract
An anti-hunting system for use with a valve operator circuit which compares two trains of pulses to place a valve in the correct position. The anti-hunting system includes a J-K flip-flop circuit receiving a clock pulse train having an absolute time relationship with the input pulse trains. Also included in the valve operator circuit is a system having a shift register for controlling the energizing of the leads to a stepping motor controlling the valve position.